Metal structure



Aug. 20, 1935. F. MAZZINI METAL STRUCTURE Filed May 15, 1955 gag-1 th T y may fix d by v tin in allel' rows, said main plate having side flanges,

Patented Aug. 20, 1935 I I I METAL STRUCTURE Franco Mazzim', Milan, Italy, assignor to Societa Italiana Ernesto Breda per Costruzioni Meccaniche, Milan, Italy Application May'15, 1933, Serial No. 671,229 In Italy June 18, 1932 6 Claims. (01. 189-34) This invention relates to reinforced skin plate Fig. 1 is a transverse sectional view of a coning and other constructional parts of air and struction plate according tothe present invenwater craft. tion, 7. y

I have previously proposed in my British Pat- Fig. 2 is a fragmentary elevational view of the 5 ent, No. 387,869, complete accepted February 16, construction plate, 5

1933, to form constructional parts for the build- Fig. 3 is a sectional view taken on line 3-3 ing of aeroplanes and the like of thin plates of Fig. 2, I strengthened by raised parts or bosses produced Fig. 4 is a view similar to Fig. 2 illustrating by local stamping and arranged in parallel rows, a modified form of the invention 1.0 if necessary staggered with respect to each otherf Fig. 5 is a sectional view so that the raised parts of each row are inter-' Fig. posed between those of the two lateral rows. Fig. 615 another view similar to Fig. 2 illus- This arrangement strengthens the plates in a dira ng a St furthe modified fo of the in; rection parallel to the rows of raised parts while vention, and v is permitting their adaptation to curves in a trans Fig. 7 is a sectionalview taken on line I! verse direction. of Fig. 6.

It is, however, sometimes necessary for the Referring to the drawing in each of the emplates to be adjusted to multiple and complicated bodiments shown metal plates l which are curves in various directions, while being fully strengthened by rows of bosses 23 are reinstrengthened in other directions. It is theoretiforced by bands 45 which, in their turn, are 20 cally possible to vary as desired thedistribution strengthened by rows of bosses 6-4 and 8-9- of the raised parts so as to obtain in each zone of which are aligned in a direction at an angle, that the plates the degree and character of strengthis, non-parallel, to the alignm the bosses ening'necessary; nevertheless it must be recog- 23 strengthening the plates I. It' is evident nized that this system is not convenient from the that reinforced zones produced by the strength- 25 practical point of view of convenient construcen d bands 4-5 app d y in bolting tion. This invention has for its object an arwelding, are created extending in any direction rangement which not only renders the manuiacowing to the effect of the non-parallel arrangeture very simple but it permits of an absolute ment of the bosses 2-3 of the plates l and the to strengthening in zones having any shape, extent bosses 6-1 and 8-9 of the reinforci nds and position, whilejl'eaving the other zones of 4-5. the strengthened plates adaptable to any neces- By suitably choosing the shape, width and posary curve in any direction whatever. sition of the pieces l-5, it is possible and easy The invention resides'in the main plating of a to strengthen zones of any shape and extent in structure or constructional part, strengthened the plates of the structure. 35 by means of rows of elongated bosses or raised As clearly shown in Figs. 3, 5 and 7, main plate parts as aforesaid being reinforced by similarly l is provided with flanges l0 and H which serve strengthened reinforcing plating and fixed in as a means of attaching the plates together. any manner and in any desired location to the These figures also illustrate the flanges l2 and 40 main plating such that their bosses are aligned I3 which cooperate with theflanges I 0 and H. 40 in rows at any angle, or non parallel to the rows Rivets I4 or equivalent securing means cooperate oi bosses in the main plating. with the flanges of the main plates and reinforc- Ordinarily the pieces of reinforcing plating ing strips and serve for connecting the main may take the shape of rectangular or-parallelplates'together and the reinforcing strips to the ogram shaped bands, but they may also be of any main plates.

other shape. .They may be arranged parallel to What I claim is: a h h r r lie at any a l t o a er, 1. Reinforced constructional element of metal th y may be fitt d at r t an l s t the r ws f plate comprising a main plate strengthened by bosses of the main platin at y inclination locally stamped elongated bosses arranged in paror by welding. pref ly autogenous. a plurality of strips of reinforcing plates asso- In order to more clearly Show the nature and ciated with the main plate and provided with extent of the invention, there are shown on ,the rows bf strengthening bo e t n angle t th annexed drawing Several Simplified methods o rows of bosses of the main plate, said strips havex o given a a p s in ing flanges cooperating with those of the main taken on line 5-5 of IO plate, and means securing the flanges of the strips to the flanges of the main plate.

2. Reinforced skin plating for air and water craft comprising main skin plating strengthened by locally stamped elongated bosses arranged in locally stamped elongated bosses arranged in parallel rows, said main plate having side flanges, a plurality of strips of reinforcing plates associated with the main plate and provided with rows of strengthening bosses at right angles to the rows of bosses of the main plate, said strips having flanges cooperating with those of the main plate, and means securing the flanges of the strips to the flanges of the main plate.

4. Reinforced skin plating for air and water craft comprising main skin plating strengthened by locally stamped elongated bosses arranged in parallel rows, said main plating having side flanges, a plurality of strips of reinforcing plating associated with the main plating 'and provided with rows of strengthening bosses at right angles to the rows of bosses of the main plating, said strips having flanges cooperating with those of the main plating, and means securing the flanges of the strips to the flanges of the main plating.

5. Reinforced skin plating for air and water craft comprising main skin plating strengthened by locally stamped elongated bosses arranged in parallel rows, said main plating having side flanges, a plurality of strips of reinforcing plates ing, and means'securing the flanges 'of the strips I to the flanges of the main plating.

6. Reinforced skin plating for air and water craft comprising main skin plating strengthened by locally stamped elongated bosses arranged in parallel rows, said main plating "having side flanges, a plurality of strips of reinforcing plating associated with the main plating and provided with rows of strengthening bosses, the rows of bosses on one strip being at an angle to the rows of bosses on another strip and the rows on both of said strips at an angle to the rows on themain plating, said strips having flanges cooperating with those of the main plating, and means securing the flanges of the strips to the flanges of the main plating.

FRANCO MAZZINl. 

